Question and response
Question
dig mail.isgroup.info. PTR
Answer
The response has no answer records.
Authority
isgroup.info. 1800 SOA newt.ns.cloudflare.com. dns.cloudflare.com. 2394480855 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0